Hey there, I have an nvidia XFX 7900GT video card; I recently purchased an ATI TV tuner. I believe it was the TV Tuner Pro but I'm not sure right now. (I'm at work!) I can check when I get home. For some reason I cannot get either of the two to work when they are both in my computer. But separated they work just fine. I've reformatted countless times, and can't figure out what is wrong. Could there be some compatibility issues between some nvidia and ati products that I haven't heard about? Thanks a lot.